If you attempt to port a number and receive the error message "You don't have enough licenses," you will not be able to submit a porting request. This error indicates that you must first add more Zoom Phone licenses (either a calling plan or telephone numbers) before submitting a porting request.
Phone numbers must be associated with a license. This can either be a calling plan that comes with a bundled phone number or a standalone phone number license. You will receive the above error if you are trying to port in more numbers than those supported by the licenses on your account)
Learn more about purchasing and assigning Zoom Phone licenses.